Reddit's presence in ChatGPT citations has plummeted 86% to 0.5%, following an OpenAI update that altered how the AI searches the web. The change coincides with Reddit's addition to the S&P 500.
TL;DR
- Reddit's citations in ChatGPT dropped from 3.8% to 0.5% following an OpenAI search update.
- The change could impact Reddit's traffic and visibility, despite its recent S&P 500 inclusion.
- OpenAI's update highlights the volatility and unpredictability of AI search optimization.
What happened
According to Gizmodo, Reddit's share of ChatGPT citations has dropped significantly, from 3.8% to 0.5%, following an update to OpenAI's search methodology. This change occurred between August 8 and August 14, 2025, with the most dramatic decline happening on August 14.
The update involved ChatGPT using the 'site:' operator more frequently, increasing the proportion of domain-specific searches from 0.37% to 16.8%. Additionally, the average number of searches per response nearly doubled, from 1.08 to 1.83.
OpenAI has not publicly explained the change, and PromptWatch, the data provider, cautions that the cause is not definitively known. Reddit maintains that it does not rely on LLMs for traffic and sees most of its visits directly or through traditional search.
Why it matters
This change underscores the volatility of AI search optimization, a practice known as generative engine optimization (GEO). A single backend update can significantly alter citation landscapes, impacting publishers' visibility and traffic.
For developers and startups, this highlights the importance of adapting to frequent changes in AI behavior and search methodologies. It also serves as a reminder that AI platforms can rewire their infrastructure overnight, affecting content visibility.
Investors should note that while Reddit's stock initially jumped 13% on its S&P 500 inclusion, it has since given back some gains. The company's Q2 revenue grew 61% year over year to $805 million, but concerns remain about user growth and search referral headwinds.
Key facts
- Reddit's citation share in ChatGPT dropped from 3.8% to 0.5% between August 8 and August 14, 2025.
- The change coincided with OpenAI's increased use of the 'site:' operator in ChatGPT searches.
- ChatGPT's average number of searches per response nearly doubled, from 1.08 to 1.83.
- Reddit joined the S&P 500 on August 18, 2025, with its stock initially jumping 13% before giving back some gains.
- Reddit's Q2 2025 revenue grew 61% year over year to $805 million.
- Reddit is experimenting with turning posts and comments into AI-generated short videos and podcasts.
- OpenAI has not explained the change in its search methodology, and PromptWatch cannot definitively attribute the cause.
Context
This event is not isolated. In September 2025, a similar collapse in Reddit's ChatGPT citations was reported, later attributed to changes in Google's search parameters. These incidents highlight the unpredictability and volatility of AI search optimization.
Reddit's relationship with platforms that distribute its content remains a critical vulnerability. The company is actively exploring AI integration, such as converting posts into AI-generated content, to mitigate these risks.
For the AI industry, this underscores the need for continuous adaptation and the importance of understanding the underlying mechanics of AI search and citation.
